Tim FitzHigham: The Adventurers Club, London

Given that he's something of an overgrown schoolboy, it's no surprise that Tim FitzHigham goes down well with younger audiences. Now he's come up with a show designed for children, but with enough going on to keep audiences of all ages entertained at the same time. In recent years, FitzHigham has rowed across the English Channel in a bath, blown up the world's largest balloon and set a record for running up the slopes of Mount Vesuvius. In the pursuit of comedy, he's also broken multiple bones, contracted a flesh-eating disease and a bone marrow infection. Arguably, none of this compares to the awesome challenge of keeping kids entertained for an afternoon. Accompanied by fellow comic Tiernan Douieb, he'll be taking suggestions from the young audience and weaving them into a compelling story packed with drama, action and (of course) adventure.

E4 Udderbelly, SE1, Sat

Hennessy & Friends: A History Of Violence, London

Miranda Hennessy

Featuring a number of cartoonish fights, plenty of silly voices and more ideas per minute than most sketch groups manage in the space of an hour, A History Of Violence marks the arrival of a talent to keep tabs on in the diminutive shape of writer-performer Miranda Hennessy. A bubbly, irrepressible performer with a penchant for big, broad, vastly larger-than-life characters, it's easy to imagine her going on to great things. This debut sketch show (which sees her ably accompanied by David Seymour and Steven Shapland) allows her to display her talents to the max, and it's a delightfully screwy affair, where sketches bleed into each other (while characters bleed over each other), ideas veer off in wildly unpredictable directions, and the fourth wall takes a terrible battering. Not everything works, but there are many inspired moments; watch out for the couple trying unsuccessfully to watch an action film, and be on your guard for the chocolate cheesecake sketch.

Leicester Square Theatre, WC2, Tue

Holly Walsh, London

Holly Walsh

Fans of sex-and-misery sitcom Pulling will doubtless be hooked on Dead Boss, the latest work from the bleakly comic mind of Sharon Horgan. But that new show isn't just Horgan's baby; it's the product of a lengthy collaboration with Holly Walsh, a first-class comic in her own right. Walsh is best known for stints as a CBBC presenter, as well as a brush with the headlines in 2010, when she suffered multiple injuries at the Worthing Birdman competition. As a stand-up, she draws heavily on her dull upbringing in Guildford and status as a perpetual wallflower, creating a stream of richly funny vignettes that comment archly on the nature of contemporary relationships, the perils of fame and the consequences of everyday misfortune.